I had an idea for some quick-rig sponsons. Before I spend the money to try it out I'd like to get some opinions. Basically, I would get two of those boat/dock fenders (bumpers). Put one on each side of the canoe right above the waterline and run one of those tie down straps or ratchet straps around the canoe to hold them in place. I know the strap on the bottom of the canoe would create a little drag in the water but that's okay. Any thoughts or suggestions?